/* ==========================================================================
   TOPtrony.cz — Stylesheet
   ========================================================================== */

:root {
    --color-bg:        #fafaf8;
    --color-surface:   #ffffff;
    --color-text:      #1a1a18;
    --color-muted:     #6b6b66;
    --color-border:    #e5e5e0;
    --color-accent:    #c8a44e;
    --color-accent-dk: #a8883a;
    --color-dark:      #1a1a18;
    --color-dark-2:    #2a2a28;
    --color-green:     #2d8a4e;
    --color-blue:      #3a6ea5;
    --color-red:       #c0392b;
    --color-warning:   #d4a017;
    --radius:          6px;
    --radius-lg:       10px;
    --font:            'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif:      'Instrument Serif', Georgia, serif;
    --shadow-sm:       0 1px 3px rgba(0,0,0,0.06);
    --shadow:          0 2px 8px rgba(0,0,0,0.08);
    --shadow-lg:       0 4px 20px rgba(0,0,0,0.10);
    --transition:      0.2s ease;
}

/* RESET */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font);
    font-size: 15px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent-dk); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent); }

/* LAYOUT */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}
.container--narrow { max-width: 800px; }

.section { padding: 64px 0; }
.section--dark { background: var(--color-dark); color: #d0d0cc; }

/* ---------- HEADER ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(250,250,248,0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.02em;
    text-decoration: none;
    color: var(--color-text);
}
.logo__top { color: var(--color-accent); }
.logo__trony { color: var(--color-text); }
.logo__tld { color: var(--color-muted); font-weight: 400; font-size: 0.75em; }
.logo--footer { font-size: 20px; margin-bottom: 12px; display: inline-block; }
.logo--footer .logo__trony { color: #d0d0cc; }

.main-nav { display: flex; gap: 4px; }
.nav-link {
    padding: 8px 14px;
    font-size: 14px;
    font-weight: 450;
    color: var(--color-muted);
    border-radius: var(--radius);
    transition: all var(--transition);
}
.nav-link:hover, .nav-link.active {
    color: var(--color-text);
    background: rgba(0,0,0,0.04);
}
.nav-link.active { font-weight: 600; }

.mobile-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.mobile-toggle span {
    display: block; width: 20px; height: 2px; background: var(--color-text);
    margin: 4px 0; border-radius: 2px; transition: var(--transition);
}

/* ---------- HERO ---------- */
.hero {
    padding: 80px 0 72px;
    text-align: center;
    background: linear-gradient(180deg, var(--color-bg) 0%, #f0efeb 100%);
}
.hero__label {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent-dk);
    margin-bottom: 16px;
}
.hero__title {
    font-family: var(--font-serif);
    font-size: clamp(2.4rem, 5vw, 3.6rem);
    font-weight: 400;
    line-height: 1.15;
    margin-bottom: 20px;
    color: var(--color-dark);
}
.hero__title em {
    font-style: italic;
    color: var(--color-accent-dk);
}
.hero__desc {
    max-width: 560px;
    margin: 0 auto 32px;
    color: var(--color-muted);
    font-size: 16px;
    line-height: 1.7;
}
.hero__actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ---------- BUTTONS ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 12px 24px;
    font-family: var(--font);
    font-size: 14px;
    font-weight: 600;
    border: 1px solid transparent;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    line-height: 1;
}
.btn--primary {
    background: var(--color-dark);
    color: #fff;
    border-color: var(--color-dark);
}
.btn--primary:hover { background: var(--color-dark-2); color: #fff; }

.btn--outline {
    background: transparent;
    color: var(--color-text);
    border-color: var(--color-border);
}
.btn--outline:hover { border-color: var(--color-text); }

.btn--ghost {
    background: transparent;
    color: var(--color-muted);
    border-color: var(--color-border);
    padding: 8px 12px;
}
.btn--ghost:hover { color: var(--color-text); border-color: var(--color-text); }

.btn--small { padding: 8px 16px; font-size: 13px; }

/* ---------- SECTION HEADERS ---------- */
.section-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 32px;
}
.section-title {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 400;
}
.section-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-accent-dk);
}
.page-title {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    font-weight: 400;
    margin-bottom: 12px;
}
.page-subtitle {
    color: var(--color-muted);
    margin-bottom: 32px;
}

/* ---------- WHEEL CARDS ---------- */
.wheel-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}
.wheel-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: box-shadow var(--transition), transform var(--transition);
}
.wheel-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}
.wheel-card__img {
    position: relative;
    aspect-ratio: 4 / 3;
    background: #f2f2ee;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.wheel-card__img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.wheel-card__placeholder { color: var(--color-border); }
.wheel-card__body { padding: 16px 20px 20px; }
.wheel-card__brand {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-accent-dk);
    margin-bottom: 2px;
}
.wheel-card__name {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}
.wheel-card__specs {
    font-size: 13px;
    color: var(--color-muted);
    margin-bottom: 8px;
}
.wheel-card__desc {
    font-size: 13px;
    color: var(--color-muted);
    margin-bottom: 12px;
    line-height: 1.5;
}
.wheel-card__footer {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--color-border);
}
.wheel-card__price { display: flex; flex-direction: column; gap: 2px; }
.wheel-card__actions { display: flex; gap: 6px; }
.price-old { font-size: 12px; color: var(--color-muted); text-decoration: line-through; }
.price-current { font-size: 18px; font-weight: 700; color: var(--color-text); }
.price-note { font-size: 11px; color: var(--color-muted); }

/* BADGES */
.badge {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 4px 10px;
    font-size: 11px;
    font-weight: 600;
    border-radius: 4px;
    letter-spacing: 0.02em;
}
.badge--green  { background: #e6f5ec; color: var(--color-green); }
.badge--blue   { background: #e6f0fa; color: var(--color-blue); }
.badge--neutral { background: #f0f0ec; color: var(--color-muted); }
.badge--warning { background: #fef3cd; color: #856404; }
.stock-badge { top: auto; bottom: 12px; left: 12px; }

/* ---------- FILTERS ---------- */
.filters {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
    margin-bottom: 24px;
}
.filters__row {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 12px;
}
.filter-label {
    display: block;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-muted);
    margin-bottom: 4px;
}
.filter-select, .filter-input {
    width: 100%;
    padding: 8px 10px;
    font-family: var(--font);
    font-size: 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-bg);
    color: var(--color-text);
    transition: border-color var(--transition);
}
.filter-select:focus, .filter-input:focus {
    outline: none;
    border-color: var(--color-accent);
}
.filters__actions {
    display: flex;
    gap: 8px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
}

.listing-meta {
    margin-bottom: 20px;
    font-size: 14px;
    color: var(--color-muted);
}
.empty-state { text-align: center; padding: 60px 20px; color: var(--color-muted); }
.empty-state .btn { margin-top: 16px; }

/* PAGINATION */
.pagination {
    display: flex;
    justify-content: center;
    gap: 4px;
    margin-top: 40px;
}
.pagination__link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-muted);
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}
.pagination__link:hover { border-color: var(--color-text); color: var(--color-text); }
.pagination__link--active {
    background: var(--color-dark);
    color: #fff;
    border-color: var(--color-dark);
}

/* ---------- USP ---------- */
.usp-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 40px;
}
.usp-item { text-align: center; }
.usp-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: rgba(200,164,78,0.12);
    color: var(--color-accent);
    margin-bottom: 16px;
}
.usp-item h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; color: #f0f0ec; }
.usp-item p { font-size: 14px; line-height: 1.6; color: #a0a098; }

/* ---------- CONFIGURATOR ---------- */
.configurator {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 24px;
    min-height: 500px;
}
.configurator__sidebar {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-height: 600px;
}
.sidebar-heading {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-muted);
}
.wheel-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
    overflow-y: auto;
    flex: 1;
}
.wheel-list__item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background: none;
    border: 1px solid transparent;
    border-radius: var(--radius);
    cursor: pointer;
    text-align: left;
    font-family: var(--font);
    transition: all var(--transition);
    color: var(--color-text);
    width: 100%;
}
.wheel-list__item:hover { background: var(--color-bg); }
.wheel-list__item.active {
    background: #faf6eb;
    border-color: var(--color-accent);
}
.wheel-list__thumb {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    overflow: hidden;
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.wheel-list__thumb img { width: 100%; height: 100%; object-fit: cover; }
.wheel-list__name { display: block; font-size: 13px; font-weight: 500; line-height: 1.3; }
.wheel-list__spec { display: block; font-size: 11px; color: var(--color-muted); }

.car-tabs { display: flex; gap: 6px; margin-bottom: 16px; flex-wrap: wrap; }
.car-tab {
    padding: 8px 16px;
    font-family: var(--font);
    font-size: 13px;
    font-weight: 500;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    cursor: pointer;
    color: var(--color-muted);
    transition: all var(--transition);
}
.car-tab:hover { border-color: var(--color-text); color: var(--color-text); }
.car-tab.active {
    background: var(--color-dark);
    color: #fff;
    border-color: var(--color-dark);
}

.configurator__preview {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    min-height: 350px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.preview-placeholder {
    text-align: center;
    color: var(--color-muted);
    padding: 40px;
}
.preview-placeholder svg { margin: 0 auto 16px; opacity: 0.3; }
.preview-placeholder code {
    font-size: 13px;
    background: var(--color-bg);
    padding: 2px 8px;
    border-radius: 3px;
}
.preview-placeholder__note { font-size: 13px; margin-top: 8px; opacity: 0.7; }
.preview-car { width: 100%; }
.preview-wheel { transition: all 0.3s ease; }

.configurator__info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 16px 20px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin-top: 16px;
}
.info-name { font-size: 15px; font-weight: 600; display: block; }
.info-spec { font-size: 13px; color: var(--color-muted); display: block; }
.info-right { display: flex; align-items: center; gap: 16px; }
.info-price { font-size: 18px; font-weight: 700; white-space: nowrap; }

/* ---------- CONTACT ---------- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 48px;
}
.contact-block { margin-bottom: 24px; }
.contact-block h3 {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-muted);
    margin-bottom: 6px;
}
.contact-block p { font-size: 15px; line-height: 1.6; }

/* FORMS */
.form { display: flex; flex-direction: column; gap: 16px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 4px;
    color: var(--color-text);
}
.form-input, .form-textarea {
    width: 100%;
    padding: 10px 14px;
    font-family: var(--font);
    font-size: 15px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-bg);
    color: var(--color-text);
    transition: border-color var(--transition);
}
.form-input:focus, .form-textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    background: #fff;
}
.form-textarea { resize: vertical; }

.alert {
    padding: 16px 20px;
    border-radius: var(--radius);
    font-size: 14px;
    margin-bottom: 16px;
}
.alert--success { background: #e6f5ec; color: var(--color-green); border: 1px solid #b5dfc5; }
.alert--error { background: #fde8e6; color: var(--color-red); border: 1px solid #f0b8b2; }

/* ---------- PROSE ---------- */
.prose { max-width: 640px; }
.prose .lead { font-size: 18px; line-height: 1.7; color: var(--color-muted); margin-bottom: 32px; }
.prose h2 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 400;
    margin: 36px 0 12px;
}
.prose p { margin-bottom: 16px; line-height: 1.75; }

/* ---------- FOOTER ---------- */
.site-footer {
    background: var(--color-dark);
    color: #a0a098;
    padding: 56px 0 24px;
    font-size: 14px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-text { line-height: 1.7; margin-top: 8px; }
.footer-heading {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: #d0d0cc;
    margin-bottom: 12px;
}
.footer-col a {
    display: block;
    color: #a0a098;
    padding: 3px 0;
    font-size: 14px;
}
.footer-col a:hover { color: #fff; }
.footer-bottom {
    padding-top: 24px;
    text-align: center;
    font-size: 13px;
    color: #666;
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 768px) {
    .main-nav { display: none; }
    .nav-open .main-nav {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--color-surface);
        border-bottom: 1px solid var(--color-border);
        padding: 16px;
        box-shadow: var(--shadow-lg);
    }
    .mobile-toggle { display: block; }

    .hero { padding: 48px 0 40px; }
    .hero__title { font-size: 2rem; }

    .wheel-grid { grid-template-columns: 1fr; }

    .configurator { grid-template-columns: 1fr; }
    .configurator__sidebar { max-height: 300px; }

    .contact-grid { grid-template-columns: 1fr; gap: 32px; }
    .form-row { grid-template-columns: 1fr; }

    .footer-grid { grid-template-columns: 1fr; gap: 32px; }

    .filters__row { grid-template-columns: 1fr 1fr; }

    .usp-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
}

@media (max-width: 480px) {
    .filters__row { grid-template-columns: 1fr; }
    .usp-grid { grid-template-columns: 1fr; }
    .wheel-card__footer { flex-direction: column; align-items: flex-start; }
}